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Caption:FRANKFURT, GERMANY - MARCH 14:(EXCLUSIVE COVERAGE)(EDITOR'S NOTE: This photo is available exclusively through Getty Images except in Germany) In this photo released today, co-pilot of Germanwings flight 4U9525 Andreas Lubitz participates in the Frankfurt City Half-Marathon on March 14, 2010 in Frankfurt, Germany. Lubitz is suspected of having deliberately piloted Germanwings flight 4U 9525 into a mountain in southern France on March 24, 2015 and killing all 150 people on board, including himself, in the worst air disaster in Europe in recent history. (Photo by Getty Images)
Caption:FRANKFURT, GERMANY - MARCH 14:(EXCLUSIVE COVERAGE)(EDITOR'S NOTE: This photo is available exclusively through Getty Images except in Germany) In this photo released today, co-pilot of Germanwings flight 4U9525 Andreas Lubitz participates in the Frankfurt City Half-Marathon on March 14, 2010 in Frankfurt, Germany. Lubitz is suspected of having deliberately piloted Germanwings flight 4U 9525 into a mountain in southern France on March 24, 2015 and killing all 150 people on board, including himself, in the worst air disaster in Europe in recent history. (Photo by Getty Images)

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Report: Germanwings co-pilot practiced crash

A new report says that Germanwings co-pilot Andreas Lubitz may have practiced a descent on a previous flight before deliberately crashing a plane into the Alps. CNN's Frederik Pleitgen reports.

Report: Germanwings co-pilot practiced crash

A new report says that Germanwings co-pilot Andreas Lubitz may have practiced a descent on a previous flight before deliberately crashing a plane into the Alps. CNN's Frederik Pleitgen reports.